diff --git a/examples/onnxrt/image_recognition/unet/quantization/ptq_static/requirements.txt b/examples/onnxrt/image_recognition/unet/quantization/ptq_static/requirements.txt
index b0c7e4bab62..315ed514cf1 100644
--- a/examples/onnxrt/image_recognition/unet/quantization/ptq_static/requirements.txt
+++ b/examples/onnxrt/image_recognition/unet/quantization/ptq_static/requirements.txt
@@ -1,4 +1,4 @@
 onnx
 onnxruntime
 onnxruntime-extensions; python_version < '3.11'
-protobuf==3.20.3
+protobuf==4.25.8